code: def SInt32ByteSize(field_number, int32):
      return UInt32ByteSize(field_number, ZigZagEncode(int32))
  
imports: import struct
  from google.protobuf import descriptor
  from google.protobuf import message
label_desc: Use image node_id 10 for calling a global function with example usage: SInt32ByteSize(field_number, int32) and returns: UInt32ByteSize